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Parthenogenetic activation and somatic cell nuclear transfer of porcine oocytes activated by an electric pulse and AZD5438 treatment

  • Xiao-Chen Li (a1), Qing Guo (a1), Hai-Ying Zhu (a1), Long Jin (a1), Yu-Chen Zhang (a1), Guang-Lei Zhang (a1), Xiao-Xu Xing (a1), Mei-Fu Xuan (a1), Qi-Rong Luo (a1), Zhao-Bo Luo (a1), Jun-Xia Wang (a1), Cheng-Du Cui (a1), Wen-Xue Li (a1), Zheng-Yun Cui (a1), Xi-Jun Yin (a2) and Jin-Dan Kang (a2)...
Summary
Summary

We examined the in vitro developmental competence of parthenogenetic activation (PA) oocytes activated by an electric pulse (EP) and treated with various concentrations of AZD5438 for 4 h. Treatment with 10 µM AZD5438 for 4 h significantly improved the blastocyst formation rate of PA oocytes in comparison with 0, 20, or 50 µM AZD5438 treatment (46.4% vs. 34.5%, 32.3%, and 24.0%, respectively; P < 0.05). The blastocyst formation rate was higher in the group treated with AZD5438 for 4 h than in the groups treated with AZD5438 for 2 or 6 h (42.8% vs. 38.6% and 37.2%, respectively; P > 0.05). Furthermore, 66.67% of blastocysts derived from these AZD5438-treated PA oocytes had a diploid karyotype. The blastocyst formation rate of PA and somatic cell nuclear transfer (SCNT) embryos was similar between oocytes activated by an EP and treated with 2 mM 6-dimethylaminopurine for 4 h and those activated by an EP and treated with 10 µM AZD5438 for 4 h (11.11% vs. 13.40%, P > 0.05). In addition, the level of maturation-promoting factor (MPF) was significantly decreased in oocytes activated by an EP and treated with 10 µM AZD5438 for 4 h. Finally, the mRNA expression levels of apoptosis-related genes (Bax and Bcl-2) and pluripotency-related genes (Oct4, Nanog, and Sox2) were checked by RT-PCR; however, there were no differences between the AZD5438-treated and non-treated control groups. Our results demonstrate that porcine oocyte activation via an EP in combination with AZD5438 treatment can lead to a high blastocyst formation rate in PA and SCNT experiments.

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Corresponding author
All correspondence to: Jin-Dan Kang or Xi-Jun Yin. Jilin Provincial Key Laboratory of Transgenic Animal and Embryo Engineering, Yanbian University, Yanji, Jilin, 133002, China. Tel: +86 0433 2435623. Fax: +86 0433 2435622. E-mail: kangjindan@hotmail.com or yinxj33@msn.com
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These authors contributed equally to this study.

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Zygote
  • ISSN: 0967-1994
  • EISSN: 1469-8730
  • URL: /core/journals/zygote
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